TNF and sarcopenia: However, when stratified according to sarcopenia status, IL-6 was positively correlated with UGT among the sarcopenia group (r = 0.48, p-value < 0.05), and negatively correlated with TNF-α among the control group, respectively (r = −0.40, r = −0.45, p-value < 0.01) (Table 5).